The photographs below are of bones obtained from the same region of a mammal body. a) Name the region from which bones were obtained. b) Identify the...

The photographs below are of bones obtained from the same region of a mammal body.

a) Name the region from which bones were obtained.
b) Identify the bones.
K
N
c) State three ways by which bone K is adapted to its function.
d) Giving a reason, name the type of joint that would be found in the animal at the proximal and distal ends of bone N.
Proximal end
Reason
Distal end
Reason
e) What is the significance of the part labelled J in the bone N?

a). Forelimb / arm / front legs / humerus – upper arm / ulna and radius lower arm / scapula – shoulder / pectoral girdle
b). K – scapula
M – Humerus.
N – Ulna
P- Radius
c).
- has a ridge or coracoids process for increasing surface area for muscle attachment
- broad, wide or flattened for increasing surface are for muscle attachment
- has a socket, cavity or glenoid cavity or depression for articulation with next bone humerus or head of humerus
- has cartilage to make it smooth
- a smooth surface of the socket for reducing or minimizing friction.
d). Proximal end – ball and socket
Reason
- head shaped like a ball / ball like rounded head / round head , allow movement in more that one plane
Distal end – hinge joint
Reason:
Allow movement in only one plane / presence of a grove / olecranon process / presence of condl / trochlea which articulates with sigmoid notch
e). attachment of musles / tendons formation of hinge jpint, prevent overstretching of forearms backwards allow movement in only one plane

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sharon kalunda answered the question on May 27, 2019 at 07:57

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